Dwarf Planet Eris

Nobody. The only place other than Earth where people have walked is the moon. Eris has only been observed through telescopes and has not even been visited by a space probe.

No. Eris is too small and too distant to be seen without a powerful telescope. That is why it was not discovered until 2005.

Some well-known goddesses from various mythologies include Athena (Greek), Freyja (Norse), Kali (Hindu), and Isis (Egyptian). These goddesses are associated with different aspects of life, such as wisdom, love, destruction, and magic, respectively.

Eris is a Goddess who is kind of like a Feminine counterpart to Ares and an "opposing forse" to Eros (in some Hellenic traditions, at least) in much the same way that Ares is an opposite to Aphrodite. Intriguingly, some mythos also pair Her as a "consort" or daughter of Ares similarly to how Eros is paired as a Son to Aphrodite - in that sense, like Eros, She has a "trickster" quality. found this on a website...and its pretty helpful

There is some misconception in the question as it says that pluto blasted but it has not it is still there. And for the new planets which are not really declared planets but are dwarfs are Xena and Ceres.

Eris was the Greek goddess of strife and discord. As a goddess, she was immortal herself. She would have been known to mortals and immortals alike.

None. There are not even any plans in development to visit Eris. Humans have never gone farther than the moon. Pluto is the most distant object visited by a man-made object.